Graph"o*type (?), n. [Gr.
gra`fein to write + -type.] (Engraving)
A process for producing a design upon a surface in relief so
that it can be printed from. Prepared chalk or oxide of zinc is
pressed upon a smooth plate by a hydraulic press, and the design is
drawn upon this in a peculiar ink which hardens the surface wherever
it is applied. The surface is then carefully rubbed or brushed,
leaving the lines in relief.